Several people have done MAF conversions on the car, I'm not sure on the specifics (as to what computer was used) but I'm fairly sure it was a 'kit' sold by pro-m.
If you are going to put the engine in something, use a merkur wiring harness, it makes the install VERY easy. Trying to make a Xr4TI reliably fast on the otherhand is NOT so easy.
Put it in a ford fairmont or fox body mustang. Cheap, light, and fast.